js判断当前页面在移动设备还是在PC端中打开

方法一：

var isPC = function ()
{
    var userAgentInfo = navigator.userAgent.toLowerCase();
    var Agents = new Array("android", "iphone", "symbianOS", "windows phone", "ipad", "ipod");
    var flag = true;
    for (var v = 0; v < Agents.length; v++) {
        if (userAgentInfo.indexOf(Agents[v]) > 0) { flag = false; break; }
    }
    return flag;
}

前端调用  不需要jq
<script src="../../js/isPc.js"></script>
        <script>
            var isPC = isPC();
            if(!isPC){
                //window.location.href = 'm/index.html';
　　　　　　　　　　//执行移动端要执行的代码
                console.log("移动端");
            }
        </script>

方法二：

　　js判断用户的浏览设备是移动设备还是PC

<script type="text/javascript">
    function browserRedirect() {
      var sUserAgent = navigator.userAgent.toLowerCase();
      var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
      var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
      var bIsMidp = sUserAgent.match(/midp/i) == "midp";
      var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
      var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
      var bIsAndroid = sUserAgent.match(/android/i) == "android";
      var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
      var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
      document.writeln("您的浏览设备为：");
      if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {
        document.writeln("phone");
      } else {
        document.writeln("pc");
      }
    }

    browserRedirect();
  </script>

判断详细浏览器设备信息：

var browser = {
             versions: function () {
               var u = navigator.userAgent, app = navigator.appVersion;
               return {     //移动终端浏览器版本信息
                 trident: u.indexOf('Trident') > -1, //IE内核
                 presto: u.indexOf('Presto') > -1, //opera内核
                 webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核
                 gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核
                 mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端
                 ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
                 android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或uc浏览器
                 iPhone: u.indexOf('iPhone') > -1, //是否为iPhone或者QQHD浏览器
                 iPad: u.indexOf('iPad') > -1, //是否iPad
                 webApp: u.indexOf('Safari') == -1 //是否web应该程序，没有头部与底部
               };
             }(),
             language: (navigator.browserLanguage || navigator.language).toLowerCase()
           }
           if (browser.versions.mobile) {//判断是否是移动设备打开。browser代码在下面
               var ua = navigator.userAgent.toLowerCase();//获取判断用的对象
               if (ua.match(/MicroMessenger/i) == "micromessenger") {
                   //在微信中打开
                  setInterval(WeixinJSBridge.call('closeWindow'),2000);
               }
               if (ua.match(/WeiBo/i) == "weibo") {
                   //在新浪微博客户端打开
               }
               if (ua.match(/QQ/i) == "qq") {
                   //在QQ空间打开
               }
               if (browser.versions.ios) {
                   //是否在IOS浏览器打开
               }
               if(browser.versions.android){
                   //是否在安卓浏览器打开
               }
           } else {
               //否则就是PC浏览器打开
               window.close();
           }